openFileDialog1.Filter = "jpg files(*.jpg)|*.jpg|all files|*.*";
            openFileDialog1.Title = "Open a file...";
            openFileDialog1.FileName = "";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                pictureBox1.Image = new Bitmap(openFileDialog1.FileName);
                pictureBox1.Visible = true;
                openFileDialog1.Dispose();



            }